Pertemuan 1-2 Arsitektur Teknologi Informasi

Arsitektur Teknologi
Informasi
Dwi Cahyono, S.Kom
Apa ATI itu?
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Adalah blueprint sistem yang dibangun,
diimplementasikan dan dimaintenance yang
di gunakan untuk menjelaskan dan
menunjukkan bagaimana organisasi IT dan
elemen manajemen informasi bekerja sama
untuk efisiensi dalam mendukung tujuan dari
organisasi.
Mengapa perlu ATI?
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Terdapat beberapa keuntungan
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Meningkatkan kemampuan dalam sharing dan
efisiensi dalam proses untuk menghasilkan
informasi (improved ability to share and efficiently
process information).
Kemampuan untuk merespon perkembangan
teknologi yang sangat cepat dan kebutuhan dari
bisnis
Mengurangi biaya dikarenakan skala ekonomi
dan sharing sumberdaya (reductions in costs
because of economies of scale and resource
sharing)
How Do You Do an IT Architecture?
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Terdapat resiko dalam membangun Arsitektur
IT (There are risks involved in doing an IT
Architecture)
Pada Organisasi besar ini akan
membutuhkan waktu dan merupakan
pekerjaan yang membutuhkan biaya yang
mahal (In larger organizations it can become
a time-consuming and potentially expensive
task)
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Maximize the benefits :
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Anda harus mendefinisikan proses yang harus
diikuti (you need to: have a defined process to
follow)
Mamahami proses (understand that process well)
Mamastikan bahwa proses tersebut sesuai
dengan situasi/keadaan dan kebutuhan (make
sure that the process fits your situation and
needs)
When doing an IT Architecture you
need to focus on:
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Aktifitas bisnis - the business activities (work)
performed including performance measures, how
they are organized, and where they take place
Set data dan aliran informasi - the data sets and
information flows needed to perform the activities
Aplikasi dan Sotware - the applications and
software needed to capture and manipulate the
information sets
Teknologi - and the technology (hardware,
network,communications) needed to run the
applications
THE SEVEN STEP PROCESS
One approach to doing IT architectures.
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STEP 1 - DEFINE YOUR VISION,
OBJECTIVES, AND PRINCIPLES
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Who and what are your IT Architectural efforts
(usaha) going to cover?
What general IT principles will guide your efforts?
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Sebelum melakukan hal lain, diperlukan suatu visi
dari apa yang sedang berusaha dipenuhi serta
beberapa sasaran khusus.
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Langkah pertama yang lain harus menjadi
seperangkat Prinsip Arsitektur TI - pernyataan dari
pilihan arah atau praktek tentang bagaimana
organisasi atau proses itu akan menggunakan
TI. Ini dapat membantu untuk menyediakan
konteks bagi keputusan arsitektur tertentu
kemudian dalam proses dan juga membantu untuk
membuat keputusan yang konsisten .
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Beberapa kelihatan begitu nyata bahwa
pertanyaannya adalah mengapa begitu
menyusahkan kita, tetapi dengan
mendokumentasikan prinsip/aturan/role dan
menjaganya sebagai proses maka kesulitan itu
dapat dilewatkan.
STEP 2 - CHARACTERIZE YOUR IT BASELINE
How does your office do its business, what
Information Technology is used,
and how is it used?
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Langkah berikutnya dalam proses Arsitektur
TI adalah mengetahui karakter dari sistem
yang ada.
Ambil / Capture Kapabilitas dari sistem TI
yang ada.
Mengetahui karakter dari sistem yang ada
dalam arti bukan hanya dibutuhkan untuk
mengidentifikasi dan menganalisa semua
yang berkaitan dengan TI tetapi juga
Informasi yang terkait dan mengalir pada
semua organisasi yang terkait.
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Kita hanya membutuhkan data yang
cukup untuk mengerti situasi
dasar/sekarang dan masalah yang ada
serta untuk membangun ide kemana kita
akan mulai.
Skala dari tugas ini tergantung, tentu
saja, pada ukuran dan kompleksitas
organisasi.
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The following are just examples – different
organizations choose different ways of
characterizing their baseline, but these give an idea
on one approach.
 What Work is Performed? You must have a
clear understanding of what work the organization
performs and where it is performed (anywhere
from one small location to throughout the nation
or even the world).
 What Information is Needed for that Work and
by Whom? You need to understand the basic
flow of information, not just within your
organization but also to and from outside
customers or suppliers, and what the information
consists of, how that information is organized, and
whatever else is needed to give you a clear
understanding of the information.
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What Applications are Used to Process that
Information? What software is used to process,
analyze, move, etc., the needed information?
What types of file structures are used? What
protocols are involved in transfers?
What Technology is Used to Perform the
Work? What IT hardware is currently used,
including telecommunications and networking
equipment?
STEP 3 - CREATE A TARGET ARCHITECTURE
What do you want your IT Architecture to look like
in the future?
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At this point in the process you should know where you
currently stand.
Now you need to try to figure out where you would like to
be (or need to be) in the future.
How should the workflow ideally work? What generic
types of applications and technology would be used?
You are developing a model of What do you want your IT
Architecture to look like in the future?
the IT structure, not identifying the specific standards for
products to be used (later you will create standards and
guidelines that will be used by the organization for the
acquisition of technology, applications, and services, but
those are not the Target Architecture itself).
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To do this step effectively you must first
understand the forces that are driving the
need for change – the “drivers” in the
business and technology areas.
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Business drivers are ones telling you that
you need to do business differently.
Customers may be demanding better or
different services.
Organizations that you work with may want to
change how you exchange data.
The methods now used to do business may
not be cost efficient in the future.
Or the drivers may be instructions from
higher-level organizations or from laws.
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Technology drivers are ones that tell you
that technology is giving or will give you
options for doing things differently (and
hopefully better).
Many parts of the Department of Commerce,
for instance, realized the potential of the
Internet and started using it to provide
products and services to the public long
before any outside forces told them that they
should do this.
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What other technologies are out there that may
provide you with similar future opportunities?
IT security is a particularly strong driver that should
be addressed when developing all parts of the
Architecture.
By analyzing these drivers and your current
baseline, you can start to define your future
business and technology models – how you see the
future business process working, the general
technological tools needed to make that process
effective, and how those tools need to interrelate.
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The Target Architecture is the heart of the
process. The four components (business
activities including performance measures,
data sets and information flows, applications
and software, and technology) of the IT
Architecture need to be modeled separately.
STEP 4 - DETERMINE THE GAPS BETWEEN YOUR
CURRENT AND TARGET ARCHITECTURES
What are the differences between your baseline and the
architecture you want to achieve?
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So by this time you should know where you
are now and where you want to be at some
point in the future. It is time to evaluate how
long that road is.
How far is the organization from the target?
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The gaps have to be identified for each
component of the IT Architecture.
Where are the gaps large and where are they
small? How difficult will it be to bridge those
gaps? How much time, money, resistance
from users, etc., may be involved? The
nature of your organization plays a great role
in this analysis.
A smaller centralized organization or one
where IT is controlled by one office will face
different issues than a decentralized office
with little or no central IT control.
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There may be gaps that are theoretically
easy to solve - say a change with no
complicated shift in technology and that will
actually save money immediately – but that
would face such fierce resistance by What
are the differences between your baseline
and the architecture you want to achieve?
users that the organization would decide that
there is a large and difficult gap here, with
difficult decisions as to whether and how to
bridge that gap.
STEP 5 - DEVELOP A MIGRATION PLAN
How will you bridge the gaps between the baseline and the
Target Architecture?
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You now know your baseline, your Target
Architecture, the gaps between the two, and
the issues involved in bridging those gaps.
The next step is to plan for when and how
you are going to actually do that bridging.
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Many factors are involved, including those that you
looked at in the gap analysis.
Are there “quick wins” where the organization can
realize benefits right away and for a minimal cost
and effort? Besides the immediate benefits, these
can show doubters the value of an IT Architecture.
Or are the real problems ones that need immediate
concentration on more major and long-term tasks?
Which actions depend upon other actions to be
effective? In some cases at least an informal costbenefit analysis may be needed.
STEP 6 - IMPLEMENT THE MIGRATION PLAN AND
ARCHITECTURE
Start implementing the plan to bridge the IT architectural gaps.
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Obviously the steps leading up to this one will
be of limited value if implementation never
takes place. But what does “implementation”
really mean? It does not necessarily mean
that the organization must immediately
convert its IT and information systems to the
Target Architecture.
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If the IT Architecture is guiding the
procurement and development of technology
and systems, then it is being implemented,
even if it may take a number of years before
the Target Architecture’s goals are fully
realized
As mentioned above in Step 5, a migration
plan can identify priorities where the
application of the organization’s available
resources and time can produce the greatest
benefits.
STEP 7 - REVIEW AND UPDATE REGULARLY
An IT Architecture is a process, not a document.
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Technology is changing very quickly these
days, and that trend doesn’t appear likely to
slow down or stop. Business needs and
processes also change over time. So a
Target Architecture, whether fully
implemented or not, that addresses how IT
and information will serve business needs
must be periodically reviewed and updated to
reflect those changes.